/*
 *   Copyright 2021 zzh
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 */

package com.aduib.boot.common.security;

import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;

/**
 * @author ZZH
 * @version 1.0.0
 */
public class RSAKeyUtils {

  /**
   * 解码PublicKey
   *
   * @param key
   * @return
   */
  public static PublicKey getPublicKey(String key) {
    try {
      byte[] byteKey = Base64.getDecoder().decode(key);
      X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(byteKey);
      KeyFactory keyFactory = KeyFactory.getInstance("RSA");
      return keyFactory.generatePublic(x509EncodedKeySpec);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
  }
  /**
   * 解码PrivateKey
   *
   * @param key
   * @return
   */
  public static PrivateKey getPrivateKey(String key) {
    try {
      byte[] byteKey = Base64.getDecoder().decode(key);
      PKCS8EncodedKeySpec x509EncodedKeySpec = new PKCS8EncodedKeySpec(byteKey);
      KeyFactory keyFactory = KeyFactory.getInstance("RSA");
      return keyFactory.generatePrivate(x509EncodedKeySpec);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
  }
}
